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    hydrogen peroxide tagged posts

    Hydrogen Peroxide found on Jupiter’s Moon Ganymede in Higher Latitudes

    July 26, 2023, Categories  Astronomy/Space

    Hydrogen peroxide found on Jupiter's moon Ganymede only in higher latitudes
    Maps of Ganymede’s 3.5 μm H2O2 absorption compared to those of the 3.1 μm Fresnel peaks of water ice and corresponding projections of the U.S. Geological Survey Voyager–Galileo imaging mosaic. H2O2 appears constrained to the upper latitudes, particularly on the leading hemisphere, which exhibits sharp boundaries at approximately ±30° to 35° latitude. These boundaries are roughly coincident with the onset of Ganymede’s polar frost caps and with the latitudes at which most of the impinging Jovian magnetospheric particles can access the surface. Maps of the Fresnel reflection peak of water ice, which generally track the distribution of ice deduced from shorter-wavelength water bands, also show the areas of greatest H2O2 on the leading hemisphere to be enriched in water ice...
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    New Device Produces Hydrogen Peroxide for Water Purification

    April 3, 2017, Categories  Biology/Biotechnology, Environment/Geology, Health/Medical

    Schematic illustration of an on-site water purification system for rural communities. Powered by solar panels, the low-cost, portable device produces hydrogen peroxide from oxygen gas and water. Credit: Zhihua Chen/Stanford University

    Schematic illustration of an on-site water purification system for rural communities. Powered by solar panels, the low-cost, portable device produces hydrogen peroxide from oxygen gas and water. Credit: Zhihua Chen/Stanford University

    Many disease-causing organisms and organic pollutants can be quickly removed from water using H2O2 without leaving any harmful residual chemicals. However, producing and distributing hydrogen peroxide is a challenge in many parts of the world. Now scientists at the Dept of Energy’s SLAC National Accelerator Laboratory and Stanford University have created a small device for hydrogen peroxide production that could be powered by renewable energy sources, like conventional solar panels.

    “The idea is to develop an electrochemical cell that generates hydrogen perox...

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    Why High-Dose Vitamin C Kills Cancer Cells

    January 10, 2017, Categories  Biology/Biotechnology, Health/Medical

    Tumor cells have decreased ability to metabolize H2O2: Implications for pharmacological ascorbate in cancer therapy

    Tumor cells have decreased ability to metabolize H2O2: Implications for pharmacological ascorbate in cancer therapy

    Low levels of catalase enzyme make cancer cells vulnerable to high-dose vitamin C. Vitamin C has a patchy history as a cancer therapy, but researchers at the University of Iowa believe that is because it has often been used in a way that guarantees failure. Most vitamin C therapies involve taking the substance orally. However, the UI scientists have shown that giving vitamin C ntravenously – bypassing normal gut metabolism and excretion – creates blood levels that are 100 – 500 times higher than levels seen with oral ingestion. It is this super-high concentration in the blood that is crucial to vitamin C’s ability to attack cancer cells.

    Earlier work by UI redox biology expe...

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